Double-door bolt.



J. 6L A. LEDOUX.

DOUBLE DOOR BOLT.

APPLIOATION FILED 11011.16. 1909.

Patented Mar. 1,1910.

INH

` To all whom 'it may concern:

v locked and both of JOSEPH LEDOUX AND @TEUR LEDOUX, OF WORCESTER, MASSACHUSETTS.

DOUBLE-DOOR BOLT.

Application led November 1 Be it known that we, JOSEPH LEnoUx and ARTHUR LEnoUx, citizens of the United States, both residing at Worcester, in the county of Worcester and State of Massachusetts, have invented a new and useful Double-Door Bolt, of which the following is a specification.

This invention relates to a double door bolt particularly adapted for that class of double doors which are made u of two swinging doors, 'one of which or lnarily is which have to be opened at certain times. a

The principal objects of the invention are to provide a simple, convenient and inexpensive means whereby one of the doors can be locked firmly at the to and bottom so that it can be kept locke under ordinary conditions and at the same time the other door can be locked to it and yet to provide Specification o! Letters Patent.

6, 1909. Serial No. 528,858.

means whereby the said other door can readily be unlocked so that it can be opened without interfering with" the locking bolts which lock the first named door.

The invention also involves the provision of a simpleV and compact casing and a very convenient and inex ensive arrangement of hr locking means with respect to the several o ts.

Further objects/and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in whichj Figure 1 is a front elevation of one form in which the invention can be embodied, and Fig. 2 is a transverse sectional view thereof through the center of the lock.

The invention is shown as applied to a swin ing door 10 and a companlon swinging oor 11. Ordinarily the door 10 is intended to be locked and the door 11 opened frequently without interferin with the door 10. On the door 10 is p aced a lock casing 12 Which is hollow and rovided with two bolts 13 extending there rom in opposite directions and in 'alinemcnt, each one being adapted to enter a slot 14 in the top or bottom of the door casing to hold the door 10 locked. Also projecting from the lock casing is a transverse bolt 15 adapted to enter a slot 16 in the door 11 to lock that door to the door 10. Each of these bolts is rovided with a in 2O fixed thereto near the inner end thereo Pivoted at a point preferably equally distant from the inner ends Patented Mar. 1, 1910.

of the bolts on a screw 21 is an o cam 22 having a handle 23 exten' ing out through a slot 24 in the casing. This o erating cam is pivoted to oscillate througi a certain arc and is provided with a plurality of slots 25 each of which starts from a point near the center' and' extends toward the cir. cumference ofthe cam in a direction at an angle to the radius thereof. They are shown as of curved form and each is of about the same curvature.

The several bolts are provided with transverse passages 26 substantially centrally located thereln into which the cam projects and the pins 20 with which the bolts are provided are supported in the opposite walls of these passages and extend t rough them and through the slots 25 in the cam. It will be seen, therefore, that the oscillation of the cam will simultaneousl project all the bolts outwardly or retract t em inwardl This in itself would lock both doors an unlock them at the same time. It is desired, however, to lock the door 10 in such a way that the door 11 can be free to be opened when desired, althou h it will ordinarily remain locked. For this purpose the one of the slots 25 which coperates with the bolt 15 is provided with an off-set 27 extending radially toward the center of the cam and of suiiicient size to receive the pin 20. ocated in or adjacent to this off-set is a spring 28 mounted on a pin 29. This spring obviously tends to force the bolt 15 outwardly so that in the ordinary operation of the device, as described above, the bolt 15 will operate just the same as the bolts 13. However, when the parts are in locked position, if the cam is turned back enough to permit the pin 20 on the bolt 15 to come directly in line with the off-set 27, then the knob or handle 30 with which this pin is provided can be pressed toward the "center of the cam by hand, which will retract the bolt 15 to permit the door 11 to be o ened. The release of the knob 30 will permlt the spring 28 to force the bolt outwardly again into locking position. This pin extends through a slot 31 in the casing. It is to be observed that in order to get the parts into. this .position, the bolts 13 have to be partly wlthdrawn but as they are not wholly withdrawn this does not matter and in fact if the cam slots 25 were concentric with the center of the cam at their outer ends, these bolts need not be withdrawn at all. These slots erating immaterial if these bolts are withdrawn to a slight extent,

articularly as it is never desired to keep t e bolt 15 in the situation in which it is ca able of being withdrawn by hand except when the door is 1n constant use. In the case of an elevator whenl the door is not in use', as for example .whenthe elevatoris not runnin the cam is drawn up to its limitin position and all the parts are firmly locke In view of the advantages set forth, it isto be observed that by having the cam pass into' the passages 2'6 in the bolts, the parts are arranged in an extremely compact way `and they do not have to be made aslarge as they would otherwise because the pins 20 have bearings and su ports at both ends in the front and back o the bolts.

While we have illustrated and described a preferred form of the invention, we are aware that many modifications 'can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the. claims. Therefore, we do not wish to be limited to allthe details of construction shown and described,

v but What we do claim is i l. In a lock, the combination of an oscillatable cam, a plurality of bolts rojeoting from 'said cam in different p irections, means for connecting said bolts with the cam, whereby when the cam is moved the bolts will be simultaneously moved o utwardly or inwardly, said cam having means whereby one of said bolts can be withdrawn when the cam is in a certain position without moving the cam.

2. In a lock, the combination of two bolts located in longitudinal alinement, each having a pin thereon, a third bolt located transverse to the other two and havin a pin, an oscillatable cam having three s ots, one for receiving each of said pins, said slots bein arranged to simultaneously withdraw p a all t e bolts toward the cam when it is moved in one direction and to simultaneously project them from the cam when 'it is move in the other direction, and a spring for assisting in moving the transthereon projecting point near the circumference,

verse 'bolt `outwardly, said cam A* having means whereby the transverse bolt can be retracted in opposition to the spring when the cani. is in a certain position without changing the positions of the other 'two bolts;

3. In alock, the' combination of an oscillatable cam havin an operating handle rom the lock, said cam having a plurality o-f curved slots-each extending from a point near the center to a a plurality of `from the cam in different directions, eac having a' pin thereon for engaging one of said slots, one of the slots being provided'with a radial off-set extending inwardly toward the center of the cam for receiving the pin on the bolt o erated by that slot, and a spring for yie dinglyforcin said bolt outwardly, whereby when the bo ts are all in outward or locked position, the bolt havino` the spring can be turned back by hand with the position of the other bolts. I

4. As an article of manufacture, a lock comprising a' casing, a plurality of bolts extending outwardly through the walls of the casing, each bolt having a transverse passage in its inner end extending clear through it, a cam pivotally mounted in the casing and extending into each ofsaid passages, said cam having a plurality of slots therein, one crossin each of the bolts, each bolt having a pin xed thereon projecting into the corresponding slot of the cam ,.o1ie of said slots having a radial o-set projectolts extendin without interfering ing toward the center of the cam for receiving the pin in one of the bolts, the last named bolt having a knob or.. handle projecting through the outer wall of the casing, whereby when the other bolts are in locked position the bolt having the knob can be unlocked.

In testimony whereof we have hereunto set our hands, in the presence of two subscribing witnesses.

'JOSEPH LEDOUX.

ARTHUR lLEDQUX.

Witnesses:

A. E. FAY, C. I. HARTNETT. 

